Energy Balancing Method to Identify Nonlinear Damping of Bolted-Joint Interface

Xin Liao; Jianrun Zhang

doi:10.4028/www.scientific.net/KEM.693.318

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 693Energy Balancing Method to Identify Nonlinear...

Energy Balancing Method to Identify Nonlinear Damping of Bolted-Joint Interface

Abstract:

The interface of bolted joint commonly focuses on the research of non-linear damping and stiffness, which affect structural response. In the article, the non-linear damping model of bolted-joint interface is built, consisting of viscous damping and Coulomb friction. Energy balancing method is developed to identify the dry-friction parameter and viscous damping factor. The corresponding estimation equations are acquired when the input is harmonic excitation. Then, the vibration experiments with different bolted preloads are conducted, from which amplitudes in various input levels are used to work out the interface parameters. Also, the fitting curves of dry-friction parameters are also obtained. Finally, the results illustrate that the most interface of bolted joint in lower excitation levels occurs stick-slip motion, and the feasibility of the identification approach is demonstrated.

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Periodical:

Key Engineering Materials (Volume 693)

Pages:

318-323

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.693.318

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Online since:

May 2016

Authors:

Xin Liao*, Jianrun Zhang

Keywords:

Bolted Joint, Dry-Friction Parameter, Energy Balancing, Nonlinear Damping Model, Viscous Damping Factor

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